How to use the crossenv.utils.make_launcher function in crossenv

utils.install_script('cross-expose.py.tmpl',
                os.path.join(context.bin_path, 'cross-expose'),
                locals())

        # Don't trust these to be symlinks. A symlink to Python will mess up
        # the virtualenv.

        # Add cross-python alias to the path. This is just for
        # convenience and clarity.
        for exe in os.listdir(context.cross_bin_path):
            target = os.path.join(context.cross_bin_path, exe)
            if not os.path.isfile(target) or not os.access(target, os.X_OK):
                continue
            dest = os.path.join(context.bin_path, 'cross-' + exe)
            utils.make_launcher(target, dest)

        # Add build-python and build-pip to the path.
        for exe in os.listdir(context.build_bin_path):
            target = os.path.join(context.build_bin_path, exe)
            if not os.path.isfile(target) or not os.access(target, os.X_OK):
                continue
            dest = os.path.join(context.bin_path, 'build-' + exe)
            utils.make_launcher(target, dest)

        logger.info("Finishing up...")
        activate = os.path.join(context.bin_path, 'activate')
        with open(activate, 'w') as fp:
            fp.write(dedent(F('''\
                . %(context.cross_activate)s
                export PATH=%(context.bin_path)s:$PATH
                ''', locals())))

# Add cross-python alias to the path. This is just for
        # convenience and clarity.
        for exe in os.listdir(context.cross_bin_path):
            target = os.path.join(context.cross_bin_path, exe)
            if not os.path.isfile(target) or not os.access(target, os.X_OK):
                continue
            dest = os.path.join(context.bin_path, 'cross-' + exe)
            utils.make_launcher(target, dest)

        # Add build-python and build-pip to the path.
        for exe in os.listdir(context.build_bin_path):
            target = os.path.join(context.build_bin_path, exe)
            if not os.path.isfile(target) or not os.access(target, os.X_OK):
                continue
            dest = os.path.join(context.bin_path, 'build-' + exe)
            utils.make_launcher(target, dest)

        logger.info("Finishing up...")
        activate = os.path.join(context.bin_path, 'activate')
        with open(activate, 'w') as fp:
            fp.write(dedent(F('''\
                . %(context.cross_activate)s
                export PATH=%(context.bin_path)s:$PATH
                ''', locals())))